Early game · first 8 minutes
Use Pillow Toss to push Rat King away when he gets close to your lane partner. Save a dash for rats that attach while you help them.
Rem vs Rat King
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Mid game · Walkers
Use Tag Along to heal the teammate Rat King is shooting. Send a Lil Helper with them as they move toward cover; its movement speed helps them get away.
Late game · Patron
Use Naptime from behind solid cover, aiming at enemies gathered around the banner. Start when your teammates are close enough to attack once the enemies fall asleep.